# http://www.graphviz.org/content/cluster
digraph G {
graph [fontname = "Handlee"];
node [fontname = "Handlee"];
edge [fontname = "Handlee"];
bgcolor=transparent;
subgraph cluster_0 {
style=filled;
color=lightgrey;
node [style=filled,color=pink];
"publisher 1" -> "broker"[label="publish to c1"]
"publisher 1" -> "broker"[label="publish to c2"]
"publisher 2" -> "broker"[label="publish to c1"]
"publisher 3" -> "broker"[label="publish to c2"]
"subscriber 1" -> "broker"[label="subscribe to c1"]
"subscriber 2" -> "broker"[label="subscribe to c2"]
"broker" -> "subscriber 1"[label=""]
"broker" -> "subscriber 2"[label=""]
label = "*Publisher / Subscriber broker*";
fontsize = 20;
}
broker [shape=Mdiamond];
}